Battery charge control circuit
US5493197A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 15, 1993 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Sep 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Circuit groups for preventing a battery from being deteriorated in efficiency due to a charging and discharging of each of secondary batteries is incorporated in a battery protection circuit for protecting a plurality of batteries connected in series to thereby extend a life of the battery. The battery protection circuit incorporates therein power down means for extending a time in which a voltage of a remaining capacity becomes 0V as much as possible by causing a current to flow only in the minimum circuit when the battery is overdischarged. Also, when a trouble such as a momentary overcurrent or the like is detected, the circuit can be prevented from set in the power down mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.